<div class="form-group">
    <div>
        <label class="col-sm-2 control-label">短信验证</label>
        <div class="col-sm-10">
            <input id="msgCode" class="form-control " type="text">
        </div>
        <input type="button" class="button button-action" value="发送短信" id="sendMsgBtn">
    </div>
    <div class="form-group">
        <div class="col-sm-offset-6">
            <input id="step3Tostep4" type="button" class="button button-royal" value="完成">
        </div>
    </div>
    <div class="form-group" id="alertDiv"></div>
</div>